Display screen or portion thereof with transitional graphical user interface



FIG. 1 is a front view of the first image in a sequence for a displayscreen or portion thereof with transitional graphical user interfaceshowing our new design according to a first embodiment;

FIG. 2 is the second image thereof;

FIG. 3 is the third image thereof;

FIG. 4 is the fourth image thereof;

FIG. 5 is a front view of the first image in a sequence for a displayscreen or portion thereof with transitional graphical user interfaceshowing our new design according to a second embodiment;

FIG. 6 is the second image thereof;

FIG. 7 is the third image thereof;

FIG. 8 is the fourth image thereof;

FIG. 9 is a front view of the first image in a sequence for a displayscreen or portion thereof with transitional graphical user interfaceshowing our new design according to a third embodiment;

FIG. 10 is the second image thereof;

FIG. 11 is the third image thereof;

FIG. 12 is the fourth image thereof;

FIG. 13 is a front view of the first image in a sequence for a displayscreen or portion thereof with transitional graphical user interfaceshowing our new design according to a fourth embodiment;

FIG. 14 is the second image thereof;

FIG. 15 is the third image thereof; and,

FIG. 16 is the fourth image thereof.

The outer perimeter shown as a pair of broken lines in the drawingsillustrates a display screen or portion thereof and forms no part of theclaimed design. The remaining broken lines in the drawings illustrateportions of the graphical user interface that form no part of theclaimed design.

The appearance of the transitional image sequentially transitionsbetween the images shown in FIGS. 1-4, 5-8, 9-12, and 13-16,respectively. The process or period in which one image transitions toanother image forms no part of the claimed design.

CLAIM The ornamental design for a display screen or portion thereof withtransitional graphical user interface, as shown and described.